While a CINAHL search is prbably the best place to start, you should probably dig deeper. CINAHL does NOT include books or book chapters. Also, and perhaps more relevant with this subject matter, it doesn't include everything in the realm of conference procedings, organizational reports, etc.
Too often, students and other beginners just do a quick search of a computerized database of titles and/or major subject heads -- thereby only skimming the surface. For example, someone may have written an entire book on the topic and it would never show up on a CINAHL search.
One of the easiest ways to start digging deeper is to actually look at some of the best articles you find through a search such as CINAHL -- and look at the references used by that author. Do that with several different, recent articles and you start to develop a deeper list of the relevant literature.
You should also to a search specific to books, conference procedings, etc. Your librarian should be able to help you access the relevant databases.
Finally, you should ask the faculty member how deep he/she wants you to go. She might be satisfied with a simple CINAHL search, but she might want a whole lot more. Also, as he/she is probably already familiar with the topic, he/she may be able to point you in the right direction to specific websites, books, etc. to start digging.